Merge branch 'master' of git://git.denx.de/u-boot-imx

[oweals/u-boot.git] / board / ti / beagle / beagle.c

diff --git a/board/ti/beagle/beagle.c b/board/ti/beagle/beagle.c
index c5d6679f482493a48417cc53f54416a3168b30b7..d9b6f01163b609cfdbc4f6340574b04718a6566c 100644 (file)
--- a/board/ti/beagle/beagle.c
+++ b/board/ti/beagle/beagle.c
@@ -39,6 +39,27 @@
 #include <asm/mach-types.h>
 #include "beagle.h"
 
+#define TWL4030_I2C_BUS                        0
+#define EXPANSION_EEPROM_I2C_BUS       1
+#define EXPANSION_EEPROM_I2C_ADDRESS   0x50
+
+#define TINCANTOOLS_ZIPPY              0x01000100
+#define TINCANTOOLS_ZIPPY2             0x02000100
+#define TINCANTOOLS_TRAINER            0x04000100
+#define TINCANTOOLS_SHOWDOG            0x03000100
+#define KBADC_BEAGLEFPGA               0x01000600
+
+#define BEAGLE_NO_EEPROM               0xffffffff
+
+static struct {
+       unsigned int device_vendor;
+       unsigned char revision;
+       unsigned char content;
+       char fab_revision[8];
+       char env_var[16];
+       char env_setting[64];
+} expansion_config;
+
 /*
  * Routine: board_init
  * Description: Early hardware init.
@@ -94,6 +115,31 @@ int get_board_revision(void)
        return revision;
 }
 
+/*
+ * Routine: get_expansion_id
+ * Description: This function checks for expansion board by checking I2C
+ *             bus 1 for the availability of an AT24C01B serial EEPROM.
+ *             returns the device_vendor field from the EEPROM
+ */
+unsigned int get_expansion_id(void)
+{
+       i2c_set_bus_num(EXPANSION_EEPROM_I2C_BUS);
+
+       /* return BEAGLE_NO_EEPROM if eeprom doesn't respond */
+       if (i2c_probe(EXPANSION_EEPROM_I2C_ADDRESS) == 1) {
+               i2c_set_bus_num(TWL4030_I2C_BUS);
+               return BEAGLE_NO_EEPROM;
+       }
+
+       /* read configuration data */
+       i2c_read(EXPANSION_EEPROM_I2C_ADDRESS, 0, 1, (u8 *)&expansion_config,
+                sizeof(expansion_config));
+
+       i2c_set_bus_num(TWL4030_I2C_BUS);
+
+       return expansion_config.device_vendor;
+}
+
 /*
  * Routine: misc_init_r
  * Description: Configure board specific parts
@@ -141,6 +187,55 @@ int misc_init_r(void)
                printf("Beagle unknown 0x%02x\n", get_board_revision());
        }
 
+       switch (get_expansion_id()) {
+       case TINCANTOOLS_ZIPPY:
+               printf("Recognized Tincantools Zippy board (rev %d %s)\n",
+                       expansion_config.revision,
+                       expansion_config.fab_revision);
+               MUX_TINCANTOOLS_ZIPPY();
+               setenv("buddy", "zippy");
+               break;
+       case TINCANTOOLS_ZIPPY2:
+               printf("Recognized Tincantools Zippy2 board (rev %d %s)\n",
+                       expansion_config.revision,
+                       expansion_config.fab_revision);
+               MUX_TINCANTOOLS_ZIPPY();
+               setenv("buddy", "zippy2");
+               break;
+       case TINCANTOOLS_TRAINER:
+               printf("Recognized Tincantools Trainer board (rev %d %s)\n",
+                       expansion_config.revision,
+                       expansion_config.fab_revision);
+               MUX_TINCANTOOLS_ZIPPY();
+               MUX_TINCANTOOLS_TRAINER();
+               setenv("buddy", "trainer");
+               break;
+       case TINCANTOOLS_SHOWDOG:
+               printf("Recognized Tincantools Showdow board (rev %d %s)\n",
+                       expansion_config.revision,
+                       expansion_config.fab_revision);
+               /* Place holder for DSS2 definition for showdog lcd */
+               setenv("defaultdisplay", "showdoglcd");
+               setenv("buddy", "showdog");
+               break;
+       case KBADC_BEAGLEFPGA:
+               printf("Recognized KBADC Beagle FPGA board\n");
+               MUX_KBADC_BEAGLEFPGA();
+               setenv("buddy", "beaglefpga");
+               break;
+       case BEAGLE_NO_EEPROM:
+               printf("No EEPROM on expansion board\n");
+               setenv("buddy", "none");
+               break;
+       default:
+               printf("Unrecognized expansion board: %x\n",
+                       expansion_config.device_vendor);
+               setenv("buddy", "unknown");
+       }
+
+       if (expansion_config.content == 1)
+               setenv(expansion_config.env_var, expansion_config.env_setting);
+
        twl4030_power_init();
        twl4030_led_init(TWL4030_LED_LEDEN_LEDAON | TWL4030_LED_LEDEN_LEDBON);